In conjunction with Design Tide Tokyo, architect Hideyuki Nakayama (a protégé of Toyo Ito) has teamed up with UNION, a manufacturer of door handles and levers, to create a glass globe doorknob. As you approach the doorknob you catch a glimpse of  what appears to be another world, waiting for you to enter and join, but in fact is a reflection of  the room on the other side of the door.

Source: Boing Boing